package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param session
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpSession session, @RequestBody Employee employee){
        //1.将页面提交的密码password进行md5加密
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没有查询到则返回登录失败结果
        if (emp == null){
            //登录失败,用户名不存在
            return R.error("用户名不存在");
        }

        //4.密码比对,如果不一致则返回密码错误结果
        if (!emp.getPassword() .equals(password)){
            return R.error("密码错误!");
        }

        //5.查看员工状态,如果为已禁用状态,则返回员工已禁用结果
        if (emp.getStatus() != 1){
            //用户被禁用
            return R.error("用户已被禁用!");
        }
        //登录成功,将员工id存入Session并返回登录成功结果
        session.setAttribute("employee",emp.getId());//将emp数据放入session域中,代表连接建立,登录成功
        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param request
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request , @RequestBody Employee employee){
        log.info("新增员工,员工信息:  {}" , employee.toString());

        //设置初始密码123456,需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        //获得当前登录用户的id
//        Long employeeId = (Long) request.getSession().getAttribute("employee");

//        employee.setUpdateUser(employeeId);
//        employee.setCreateUser(employeeId);

        employeeService.save(employee);
        return R.success("新增员工成功");
    }


    /**
     * 分页查询,登录后主页面自动异步调用进行分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize , String name){
        log.info("page = {} ,pageSize = {} , name = {}", page,pageSize,name);

        //构建分页查询器
        Page pageInfo = new Page(page,pageSize);


        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        queryWrapper.orderByDesc(Employee::getUpdateTime);

        employeeService.page(pageInfo,queryWrapper);
        return R.success(pageInfo);
    }

    /**
     * 修改员工信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        Long employeeId = (Long) request.getSession().getAttribute("employee");
//        设置了元数据处理器来进行公共字段填充,所以controller层可以注释了
//        employee.setUpdateUser(employeeId);
//        employee.setUpdateTime(LocalDateTime.now());
        boolean b = employeeService.updateById(employee);
        return R.success("修改信息成功!");
    }

    @GetMapping("/{id}")
    public R<Employee>  getById(@PathVariable Long id){
        log.info("查询到的员工信息为 :   {}",id);
        Employee employee = employeeService.getById(id);
        if (employee!=null){
            return R.success(employee);
        }
        return R.error("没有查询到对应员工信息");
    }
}
